
R8C/14 Group, R8C/15 Group 20. Precautions
Rev.2.10 Jan 19, 2006 Page 243 of 253
REJ09B0164-0210
20.6 Clock Synchronous Serial I/O (SSU) with Chip Select
20.6.1 Access Registers Associated with SSU
After the conditions of “3 instructions or more after writing to the registers associated with SSU
(00B8h to 00BFh)“ or “4 cycles or more after writing to them” are met, read those registers.
• An example to wait for 3 instructions or more
Program Example MOV.B #00h,00BBh ; Set the SSER register to “00h”.
NOP
NOP
NOP
MOV.B 00BBh,R0L
• An example to wait for 4 cycles or more
Program Example BCLR 4,00BBh : Disable transmit
JMP.B NEXT
NEXT:
BEST 3,00BBh : Enable receive
Comentários a estes Manuais